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  • 1
    Electronic Resource
    Electronic Resource
    High-Tc superconducting lenses for relativistic electron beams (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2596-2603 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: New types of focusing lenses for relativistic electron beams (REBs) are proposed, and preliminary experimental results are obtained. The principle of the lenses is as follows: When REBs are injected into the small apertures of cylindrical superconducting lenses, self-magnetic fields of the REBs are perfectly confined in a region between the REBs and the wall of the lenses. The REBs are focused by those compressed fields. The superiority of superconducting lenses was shown using foilless REB diodes which were operated at 0.15-Torr Ne and had high-Tc , cylindrical superconductor anodes made of Y-Ba-Cu-O compounds (axial lengths of 30 and 145 mm and an inner diameter of 20 mm). The focused REBs (0.8 kA, 270 keV, pulse widths of less than 5 ns) had main beam diameters less than 2 mm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342789
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  • 2
    Electronic Resource
    Electronic Resource
    On the magnetic structure of noncollinear γ-Fe70Mn30 (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3611-3613 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The approximate d bands for a noncollinear γ-FeMn alloy are formulated by using Deegan's method and the formulas of Slater and Koster, and by taking into account the exchange interaction terms to produce the multi-spin-density-wave state. The electronic energies for the noncollinear γ-Fe70Mn30 alloy with the spin directions parallel to [100], [110], and [111] are calculated and the anisotropy energy is determined. It is seen that the state with the spin direction [111] becomes the lowest and the multi-spin-density-wave state is realized in it. For other noncollinear γ-FeMn alloys some discussions are given on the magnetic structure for them. Additionally, the anisotropy energies for noncollinear and collinear γ-FeMn alloys are discussed in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340711
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Time-resolved x-ray measurement system for studying the lattice deformation of semiconductor crystals under laser irradiation : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2342-2345 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This article describes the outline of a time-resolved x-ray measurement system developed at the Photon Factory to study the pulsed laser annealing of silicon crystals. This system consists of a triple-crystal diffractometer, Q-switched Nd:YAG laser, and two fast detector electronics using a plastic scintillation counter, and enables us to examine the time-change behavior of nearly intrinsic rocking curves under laser irradiation with a time resolution of about 50 ns. The difference in the recovery from lattice deformation between 1.06-μm laser annealing and 0.53-μm laser annealing is clarified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140764
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on Si(111) 7/8 × 7/8 -Bi and -Ag surfaces by x-ray diffraction under nearly normal incidence : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2365-2368 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: X-ray intensity versus energy (I-E) curves were measured in order to obtain the rod profiles. The three-dimensional surface structures of Si(111) 7/8 × 7/8 -Bi and -Ag were analyzed. The adsorption sites with respect to the crystal were derived from the intensity changes along the integral-order rods especially near the Bragg points by utilizing the interference effect between the x rays diffracted from the adsorbed layer and the bulk crystal. The positions of the surface Si atoms were studied by using the interference effect between the x rays diffracted from the adsorbed layer and the surface Si layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140721
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  • 5
    Electronic Resource
    Electronic Resource
    Programmed temperature controller using "MEMORIODE'' for solution crystal growth (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1964-1966 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple programmed temperature controller has been developed to grow single crystals from an aqueous solution. Linear temperature versus time ramps of several days or longer have been achieved with this instrument. From this we have been able to obtain large crystals. An analog ramp generator with an electrochemical device, named MEMORIODE, forms the basis of this design.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138454
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  • 6
    Electronic Resource
    Electronic Resource
    Deep levels in semiconducting In-alloyed bulk n-GaAs and its resistivity conversions by thermal treatments (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 221-223 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermal conversions of resistivities have been studied for In-alloyed semiconducting (100–106 Ω cm) n-GaAs grown by the liquid-encapsulated Czochralski method. These dislocation-free as-grown crystals are converted into semi-insulating (〉107 Ω cm) crystals by annealing at 950 °C for 2 h followed by a fast cooling. Such semi-insulating crystals can be converted further into crystals with lower resistivities (∼106 Ω cm) by treating them at 470 °C for 100 h. In the analysis of the as-grown samples by the temperature-dependent Hall measurements, four levels have been found with activation energies 0.13, 0.20, 0.42, and 0.50 eV. It has been shown that these resistivity conversions are induced by concentration changes of the deep states other than the midgap donor EL2, some of them being the levels found in this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99525
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  • 7
    Electronic Resource
    Electronic Resource
    Electron spin resonance observation of the creation, annihilation, and charge state of the 74-Gauss doublet in device oxides damaged by soft x rays (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 1334-1336 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The E' related defect called the 74-Gauss doublet is shown to be produced by reaction of E' with hydrogen and is positively charged like the E'. The doublet is easily annihilated by exposure to ultraviolet light in contrast to the E' which is comparatively stable. The new positive defect identified here appears to be the third paramagnetic "trivalent silicon'' apparently generally responsible for damage and repair of damage to thermal oxides on silicon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98670
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  • 8
    Electronic Resource
    Electronic Resource
    Immunoglobulin subclasses in chronic tonsillitis (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 17 (1988), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The distribution and proportion of immunoglobulin-producing cells in palatine tonsil, including IgG and IgA subclasses, have been examined in chronic tonsilitis using an immunofluorescence method. Results obtained indicate that the percentage ratios of IgG1 : IgG2 : IgG3 : IgG4 were 53.1 : 35.9 : 4.7 : 6.3. Higher percentages of IgG1- and lower percentages of IgG2-producing cells were found among 3 types of tonsilitis. Proportional ratios of IgA1 : IgA2 were approximately 80 : 20, and a slight elevation of IgA2-producing cells was observed in chronic tonsilitis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1988.tb01319.x
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  • 9
    Electronic Resource
    Electronic Resource
    A thin slice preparation for patch clamp recordings from neurones of the mammalian central nervous system (1989)
    Springer
    Pflügers Archiv 414 (1989), S. 600-612 
    Details
    ISSN: 1432-2013
    Keywords: Patch clamp ; Brain slice ; Central nervous system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract (1) A preparation is described which allows patch clamp recordings to be made on mammalian central nervous system (CNS) neurones in situ. (2) A vibrating tissue slicer was used to cut thin slices in which individual neurones could be identified visually. Localized cleaning of cell somata with physiological saline freed the cell membrane, allowing the formation of a high resistance seal between the membrane and the patch pipette. (3) The various configurations of the patch clamp technique were used to demonstrate recording of membrane potential, whole cell currents and single channel currents from neurones and isolated patches. (4) The patch clamp technique was used to record from neurones filled with fluorescent dyes. Staining was achieved by filling cells during recording or by previous retrograde labelling. (5) Thin slice cleaning and patch clamp techniques were shown to be applicable to the spinal cord and almost any brain region and to various species. These techniques are also applicable to animals of a wide variety of postnatal ages, from newborn to adult.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00580998
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  • 10
    Electronic Resource
    Electronic Resource
    Survival of cultured cells and somatic embryos of Asparagus officinalis cryopreserved by vitrification (1989)
    Springer
    Plant cell reports 8 (1989), S. 418-421 
    Details
    ISSN: 1432-203X
    Keywords: Cryopreservation ; Vitrification ; Plant germplasm ; Asparagus ; Asparagus officinalis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cultured cells and somatic embryos derived from the mesophyll tissue of asparagus (Asparagus officinalis L.) were cryopreserved by vitrification. The vitrification solution (PVS) contains (w/v) 22% glycerol, 15% ethylene glycol, 15% propylene glycol and 7% DMSO in Murashige-Skoog medium enriched with 0.5M sorbitol. After initial cryoprotection with sorbitol supplemented MS medium containing 12% ethylene glycol, cells or embryos were exposed stepwise to 85% PVS at 0°C. They were loaded into 0.5 ml transparent straws, and were then plunged directly into liquid nitrogen. After rapid warming, PVS was removed and diluted stepwise. The highest survivals of vitrified cells and embryos were about 65 and 50%, respectively. Surviving embryos developed into plantlets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00270083
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